MIL-PRF-121Revision FBarrier Materials, Greaseproof, Waterproof, Flexible, Heat-SealableLoading PDF document...This may take a momentDocument Revisions (7)Revision Revision G Notice 2 - ValidationRevision Revision G Amendment 1 (amendment incorporated)Revision Revision F (selected)Revision Revision GRevision Revision G Notice 1 - ValidationRevision Revision F Notice 2 - ReactivationRevision Revision F Notice 1 - Inactivation💬